Variable-speed apparatus.



w. B. ALLYN. YARIABLE SPEED APPARATUS. APYLICATION FILED AUG. 26, 1909.

Patented Nov. 8, 1910.

2 SHEETS-SHEET 1.

INVENTOR' WITNESSES:

975,198, Patented Nov. 8, 1910.

W. B. ALLYN."

VARIABLE SPEED APPARATUS.

APPLICATION FILED AUG. 26, 1909.

2 SHEET S-SHEB'RZ.

WITNESSES: INVENTOR WFMJAMEALZ/YN ATTORNEYS WILLIAM B. ALLYN, OFWHITESBORO, NEW YORK.

VARIABLE-SPEED AIlPARATUS.

Specification of Letters Patent.

Patented Nov. 8, 1910.

Application filed August 26, 1909. Serial No. 514,826.

T all whom it may concern:

Be it known that I, \VILLIAM l3. ALLYN,

. a citizen of the United States, and a resident of 'lYhitcsboro, in thecounty of Oneida and State of New York, have inventcd an lniprovedVariable-Speed Apparatus, of which the following is a spcciti; "cation.

My invention is a variable speed transmitting apparatus of the hydraulictype, a liq-. llltl, such as oil or water, being used as the medium forconveying force or power --fro'm the driving to the driven shaftorelenient.

1M cylindrical rotatable piston is employed "in the rotatable. casing,and the; same'is' caused not only to rotate With-sand ca'sing but tooscillate radially therein, whereby the liquid is causedto circulatejanda" valve '"wh icl1' is shiftable in theliquid chamber- SeIVSZfl-s themeans for varyiiig the speed 'of the driven shaft." The Idrivmgsha'tinay,

" therefore, be run with a constahti'speed and "Figure 1 is alongitudinal section-of the the speed'of the driven one-"will vary atthewill of the operator, that IS to say, .accordunder his control.

ing to the adjustment of the valve, which The, apparatus isparticularlyadapted for use on motor vehicles and in other places wherethe load or resistance varies, and is, in fact, applicable in anysituation where it is desirable or necessary to vary the speed betweenthe driving and driven, medium.

The details of construction, arrangement, and operation of partsembodying the invention are as hereinafter described, and

' illustrated in the accompanying drawings in which apparatus on aboutline-1- 1 of Fig. 3! Fig. 2 is a perspective view of a portion of thesome. Fig. 3 is a transverse section on the line -X X of Fig. 1. F ig.'4is a transverse section on the line Y Y.o Fig. 1. F 1g. 5 1s aperspective view of thefr'otary oscillating piston. Fig. 6, is aperspccti vevieu of the middle-member ofthe casing, Fig. 7 is a'position of the piston and eccentric. Fig. 10

is a perspective view of the valvc"-and the adjacent end portion of thecasing. Fig. 11 is a perspective view-of the valve.

Referrin particularly to Fig. 1, the numeral 7 in icates a driving-shaftjournaled at 8 in a stationary bearing, and which, in practice, isconnected with a motor or any suitable source of power. Its inner end iskeyed in the hub of a cylindrical casing. 12 isthe driven shaft, whichis alined' with fixed support, and at 14 a bearing in the hub parts,6,6, .6, secured together by bolts passeral flan es, there being a hubextension on each en One hub'end is provided with a stufling-boir-EZB,in which works a sleeve 11, mounted slidably on the drivengshaft 12".The outer-end of said sleeve has a stuifingbox 24, and on its inner endis screwed a disk valve 15, which is within the chamber. 9. of

atioirwil be presentlydescribed in detail; .It 'is apparent that, byslidin -the sleeve 11 either way, the valve 15 will e movedcorrespondingly',and forthis purpose, I emplay a pivoted hand lever 17,whose fork engages a grooved collar 16 keyed on the sleeve, as shown inFig. 1. The-middle casing member 6 has a diaphragm or partition 6" whichis provided with two ports 18 and 19,-1ocatcdadjacently and near the.peripherysee Figs. .1, 3, 6. The valve 15' may be adjusted toward orfrom or against this partition 6 to open or close the ports 18,, .19,and the valve andithc sleeve 11 are caused to rotate with the entirecasing by reason of the sliding engagement of the valve with :1 lug22s'ee Figs. 1, 2,'6-said lug being formedintegrally with the casingmember 6-, and the valve having a peripheral notch to receive the lug.On the right-hand side, Figs. 1' and 6, the partition 6* has "a circularconcentric flange 6, which projects into the chamber 9, 'wherein' therotatable cylindrical piston 27 is located. The portion of the drivenshaft 12 which traverses thepump chamber 9 is squared at 12, and on suchpart sits an eccentric 28.s'ee Figs. 1, 7. "8,9. The cylindrical iston9.7 h'asanotched periphery and a cylin rical concentric flange or hub 27that receives the said eccentric 28. The notch or radial slot 27 in thepiston receives a narrow radial abutment 30see Figs. 3, 4\vhich forms anintegral part of This abutment obviously carries the cylindrical piston27 around with it when the of the casing. The latter is formed of three.

the casin and whose construction andloperpartition 6 and separates ports18 and 19.

driver 7 and'has at 13 a bearing in some i ing through" their parallel,abutting-.periphshaft 7 and easing 6, 6, rotate and the rotation of thedriven shaft 12, will, through the medium of the eccentric 28, alsocause the piston 9T to have a slidin radial movement in chamber 9, withthe e ect to be presently described. The valve 15 is thickened on oneside and provided with transverse openings 21 to receive fixed pistons20 that may be. constructed as screws attached to the left;

7 by means of an suitable prime mover, and.

this shaft being eyed to the hub of the easing, as already described,the entire easing, together with the valve 15 and its sleeve. 11, isrotated. The piston 27 is likewise rotated with the casing but it hasanother movement due to the eccentric; that is to say, it oscillates andslides radially in the pump chamber 9". VVhe'n the valve 15 is open,thatlis tosay, adjusted in-the .posit ion shovvn in- Fig- 1,the-rotation of thecasing has no effeet on the driven shaft 12, whichremains.

stationary; In other words, the rotation of the casing with the valveopen as shown causes the-liquid in the chambers 9 and 9 to circulate inwhat may be termed a. closed circuit, it passing from one chamber 9through the port 19 into the pump' chamber 9', and then back throughport 18 into the valve'chambe'r 9. 'On the other hand, when the valve 15isadjusted into contact with the partition.6",.theports 18 andlt) areclosed by it, and the circulation of the liquid is consequentlyprevented, the portion within the pump chamber 9 'bein thus confined sothat what may be terme a liquid lock is formed by which the piston 27isheld practically stationary and consequently. the driverrshaft '12 isrotated withthe casing. It will be'understood that the' latter. is

it driven at a constant speed and .that when the valve is adjustedto'close theports 18 and 19, the driven shaft'has the same speed; but ifthe valve be opened more or less, the s eed of rotation of the drivenshaft 12 will ecrease correspondingly. It is thus within the power ofthe operator to regulate the speed of the driven shaft 12 by adjustingthe valve toward or from the ports 18 and 1.9 by means of the lever 17.

To state the operation in another way, it may be ,said that a partialclosing of the ports 18' and 19 by tneans of the valve 15 will impedethe circulation of the liquid and vary the ressure on the piston 27 andconsequently t e effect of the latter on the driven shaft 12 through themedium of the eccentric 28 will vary correspondingly and the speed ofthe driven shaft will, therefore, be chan ed according to the pressurein the pump c liamber 9". The operation of the piston thus practicallyconverts the appara- .tus into a pump, liquid being taken in through oneport and discharged through the other, owing to the revolution andsliding movement of the piston. To use an ordinary phrase, the liquid issucked into the chamber 9' through one port and is forced out throughthe other; and when the valve 'is adjusted to close the ports, there isno pumping action or circulation of the liquid and the piston being thuspractically rocked with the casing, it carries the eccentric 28 aroundwith it, and consequently the shaft 12 is driven at the same speed.

It will be understood that the shaft 7 may be .driven in eitherdirection in other words, the apparatus may be reversed without Theopenings 29 in thevalve 15 before re ferred to have no function exceptto allow a free passage of the oil water or other liquid employed in thecasing, and this obviously permits the valve to be opened or closed moreeasily. I

'Th'e pistons '20, before referred to and which work in holes 21 in thethickened side of the valve, serve to relieve to a greater or lessdegree the pressure of the liquid on the valve when it is being closed.In other words, these pistons 20 assist in balancing the pressure on thevalve. The number may be varied,,but two cover enough of the ports 18and 19 for practical purposes. It is a parent that as the valve slidestoward t e ports 18 and 19, the pistons 20 remaining stationary,cavities or chambers are thus opened in the valve which obviously servesto relieve the greater part of the pressure on the valve when the liquidis discharged through one of the ports. In brief, instead 'of the waterdischarging entirely against the face of the valve, it discharges to aconsiderable extent against the faces .of the pistons which relieves thepressure that much.

T he sides of the abutment 30 are made concaved and the inner portionof. the slot 27" in the piston 27 is also enlarged in order tofacilitate the'oscillating or sliding movement of the piston on theabutment.

' What I claim is 1. In avariable speed apparatus, arr oscillatingrotative'pumping device comprising a driving element, a driven element,a valve chamber consisting of a structure which is suitably connectedwith the casing of said pumping device, having a bearing on a rotatableand slidably mounted sleeve, ports for the passage of liquid to and fromsaid valve chamber and pump, means for filling said valve chamber andfpurn casing with a liquid, and suitable stu n oxes to prevent undueleakage of liquid, substantially as described. 7

2. In a variable speed a paratus, an oscillating rotative pumping devicecomprisin a driving element, a driven element, a dis valve mounted on orforming part of a sleeve which 'is rotatably and slida'bly' mounted on acooperating driven. shaft, means to cause said valve to rotate in unisonwith the casing, means for impartin axial movement to said valve adaptedto snnulta ncously open or close cooperating ports in the valve chamberfor controlling the passage of liquid to and from said chamber andpump,.and means for reducing pressure on said valve at the aforesaidports, substantially as described.

3. A variable speed apparatus, comprising a driving shaft, and acylindrical casing keyed thereon and having a transverse partitionprovided with ports, a valve which is slidable within the casing towardand from said partition, for closing the ports more or less, a drivenshaft passing through the casing and an eccentric on said shaft, and acylindrical piston mounted on said eccentric and made of less diameterthan the casing chamber, and a device for guiding the piston and causingit to rotate with the casing, sub stantially as described.

4. In a variable speed apparatus of the scribed.

- WILLIAM B. ALLYN. Witnesses E. C. BAKER, D. H. QOLEGRUVE.

